Air and gas mixer.



E. c. JONES.

AIR AND GAS MIXER.

- APPLICATION FILED MAR. 24, 1913.

- Patented Sept.30,1913.

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H HIIIII III MBIA PLANOGRAPH KID-.WASHINOTON D c UNITED STATES PATENT OFFICE.

EDWIN CHARLES JONES, OF TORONTO, ONTARIO, CANADA, ASSIGNOB OF ONE-HALF TO JAMES PEARSON, OF TORONTO, CANADA.

AIR AND GAS MIXER.

' Specification of Letters Patent.

Patented Sept. 30, 1913.

. Application filed-March 24, 1913. Serial No. 756,568.

To all whom it may concern:

Be it known that I, EDWIN CHARLES JONES, of the city of Toronto, in the county of York and Province of Ontario,,Dom in ion of Canada, have invented certain new and useful Improvements "in Air and Gas Mixers; and I hereby declare that the following is a full, clear, and exact description of the same. Y

Hydrocarbon gas, whether used forilluminating, heating or explosive purposes,

must be combined withatmospheric air for the oxidation of the combustible compounds,

and unless the air is combined with the gas sure from normal to increase or decrease the volume of airinproportion to the increased or decreased volume ofg'as resulting from such pressure variat on, and thus maintain the sameratio as under, normalconditions of pressure.

In carrying outfthis invention, I use a specially-constructed. mixer provided witha suitable inlet for gas and inlets'for air, and I provide the air inlets with an automatically-movable, valve controlled by the gas pressure. This mixer may be generally described as comprising a mixing, chamber with one or more air intakes, and a movable valve controlling the same, a movable gas inlet tube, one end of which is connected to said movable valve, and the other end opposed to the gas supply, and neutralizing springs engaging-the movablegas in-' let tube to maintain-it normally in; a fixed position when the gas pressure isnormal, and yieldable to allow the "gas inlet tube to move from its normal position when the gas pressure varies from normal and move' 'with it the valve controlling the air intake to provide respectively an increased or de.

creased volume of atmospheric air in proportion to the increased or decreased volume of gas admitted to the mixing chamber resulting from the variation of gas pressure. Many of the earlier types of explosiveengines were equipped with the mixing chamber in addition to the carburetor to obtain a proper combination of air and gas prior to the explosion. Under favorable conditions, the process of carbureting liquid fuel to the proper quality is readily perfected, but under unfavorable conditions,

its explosive efiiciency is materially reduced. To neutralize the effects due to unfavorable conditions, the *carbureted gas may be passed through a, mixing chamber, or the carbureter may be constructed to contain a. mixing chamber having air intakes controlled by the gas pressure as it flows from its source to its destination, by means of which the full explosive value of the gas can be automatically controlled under all .VaIIatIODS of change in atmospheric conditions and engine operation.

I have shown in the accompanying drawings, a means by whichI can carry out the above principle, but the structural character of this means may be varied without departing from the spirit of the invention.

Figure 1, is a side elevation of a mixer;

:Fig. 2, is a longitudinal section through the same-on the line 0aa Fig. 1; and, Fig. 3,

:is a cross sectional view on the line Z b Like characters-of reference refer to like .parts throughout the specification and drawings.

The essential feature A of the invention may be said to be the mixing chamber a which is provided with an air intake or intakes I), and an automatically adjustable Valve-0 controlling the area of the air intake or intakes; but as the shape and dimensions of the mixing chamber and the number of air intakes will depend entirely upon the individual views of the manufacturer, and the purpose for which the mixer is to be used, I do not wish'to confine the invention to any particular type or design in respect thereto.

In order to provide for the automatic adjustment of the valve 0, I fixedly connect it to a movable gas tube 61, one end of which projects suflic'iently into themixing chamber to be fixedly connected with the valve 0,-

and the other end of which is contained in the bore 0 of a tubular collar f forming part of the mixing chamber CZ. That end of the movable gas tube (Z within the tubular collar f is provided with. a disk 9 of substantially the same diameter as the bore a to engage the wall of the bore and assist in guiding the movement of the gas tube as it changes its position during the variation of the gas pressure, as hereinafter described. Encircling the gas tube (Z, is a spring h, one end of which bears against the adjacent face of the disk g, and the other end of which bears against a shoulder 2' adjacent to the mixing chamber end of the collar. The

' shoulder a is formed with a central bore 2" of a diameter corresponding to that of the movable gas tube'to assist the disk 9 in correctly guiding the lengthwise movement of the gas tube during the variation in gas pressure.

' supply through the connection 70. The valve Z has a port Z which, when opposedto the bore of the connection 7:, permits of the How of gas into the gas chamber m within the V valve, and is provided with a lever 0 by which it can be turned to bring the port Z into or out of line with the bore of the con-' nection Adjustable through the end Z of the valve Z is a tubular stem 7) having at its inner end a disk p, and adjustable through the tubular stem 39 is the stem 9 of the needle valve opposed to the inner end of the movable gas tube (Z.

Fitted on the outer end of the hollow r0 tary valve Z is a cap rwhich, locks the lever 0 in its set position, protectsthe stem 79 and needle valve 9' in their set position, and prevents the escape of gas from that end of the rotary valve Z when the valve is positioned for the flow of'the gas from the connection 75.

Within the gas chamber m is a spring 8' bearing against the disks 9 and p to neutralize the force of the spring 72, and maintain the gas tube (Z in a normal position when the gas pressure is normal.

The purpose of the adjustment of the tubular stem 72 is to regulate the force of the spring 3 relatively to the force of the spring /2 which is as follows :Assuming that the normal gas pressure is two pounds to the square inch and that the force exerted by the spring h and disk 9 is three pounds per square inch, in that case, the spring 8 would require to be adjusted so that it would exert a pressure of slightly more than one pound per square inch upon the disk which, taken in conjunction with the normal gas pressure, would move the disk 9 and gas tube (Z in the direction of the mixing chamber a and effect a slight movement of the valve 0. This movement of the valve 0 would slightly open the air intake or into increase the'area of the air intake so.

that an increased volume of air to the mix mg chamber would immediately occur. In

this way, it is possible for me to utilize the variation of gas pressureforaccurately con-: trolling the proper proportionsof air and gas in the mixing chamber which, as pre viously described, is necessary for perfect combustion for heating 1 purposes, nearly perfect combustion for illuminating purposes, and the productionof an explosive mixture for motive purposes.

WVhen not in use, it is possible for the air to leak into the bore 6 ofthe tubular collar f, and to provide'fo-r its educ-tion, I form the movable gas tube (Z with one or more i openings The presence of these openings (Z- permits of the contents of the bore 6 being sucked into the gas tube as the gas passes through'it from the'gasc'hamber m to the mlxing chamber a, thls suction then perm tt ng of the gas pressure and force of the spring 8 against the disk moving the gas tube in the direction of the mix-' ing chamber, which immediately results in for the admission of-the' air tocombine with the gas. f. V V

To enablethe same mixer to" be used for any one of the above three purposes, I

As i

have provided the mixing chamb'erwith 7 adjustable means for varying the area of the air intake, as the 1 area 'of'the air in-. take for heating purposes mustrbe greater V than that for illuminating purposes, and

the area of the air intake for explosive pur-. poses must'be greater than that for heat-v ing purposes. "To change the area ofthe air intake, have provided the mixing chamber a with a shutter a located between the valves andthe adjacent end of the mixing chamber, and I have fitted the shutter a with guide pins bextending through that end of the mixing chamber and fitted to a guide collar 7 a movable on the tubular collar f; Between the guide collar 0 and the end of the mixing chamber'a is a spring (Z' to press the guide collar away from the end of the mixing chamber. The tubular collar f-is screw 105 the opening of the fairrintake or lntakes I threaded tor the adjusting nutdbywhich F or explosive purposes, the adjusting nut e is positioned to permit of thespring d forcing the guide collar 0 and uide pins 7) outward to theirlimit of motion, which is determined by the shutter a coming into contact with the end of the mixing chamber a. In this position, the; shutter a" is entirely clear of the air intake'b, and when the shutter is in that position, the air intake is opened toits maximum extent.

.For heating purposes the adjusting nut e is positioned to move the shutter 41 away 7 from the end of the mixing chamber a to slightly close the air intakeor intakes and thus partly reduce'the area of the same, and for illuminatingpurposes, it isadjusted in the same direction to move the shutter a farther away to still further reduce the area of the air intake or intakes.

I have already stated that'the purpose of the adjustment of the tubular stem 10' is to regulate the force of the spring 8 on the disk g, and when this tubular stem 29 is adjusted for this regulation, it is necessary to eii'ect a corresponding adjustment of the stem 9 of the needle valve g, so that the needle valve 9' will be properly positioned to enter the adjacent end of the gas tube cl whenthe gas tube is at a position of rest, so that there will be no escape of the gas re. maining in the gas chamber m when the rotary valve has been moved to close the gas inlet. 7 V V 7 Having thus fully described the nature of my invention, what I claim as new and desire to secure by Letters Patent, is

1. An air and gas mixer comprising a mixing chamber having an air intake, a valve controlling the air intake, and an automatically-movable gas inlet tube operably connected with said valve, said inlet tube being sensitive to variations of gas pressure, whereby it automatically adjusts said valve to regulate the air intake and maintain the same proportions of air and gas in the mixing chamber under varying conditions of gas pressure.

2.An air and gas mixer comprising a mixing chamber having an air intake, a valve controlling the air intake, an automatically-movable gas inlet tube operably connected with said valve, said inlet tube being sensitive to variations of gas pressure, whereby it automatically adjusts said valve to regulate'the air intake and maintain the same proportions of air and gas in the mixing chamber under varying conditions of gas pressure, and balancing means to maintain said gas inlet tube and valve ina normal position under normal conditions of gas pressure.

3. An air and gas mixer COmPIISIIIg a mixing chamber having an air intake, a

valve controlling the air intake, a movable gas inlet tube operably connected with said valve, said inlet tube being sensitive to variations of gas pressure whereby it automatically regulates the air intake to maintain the same proportions of air and gas in the mixing chamber under varying condi- V tions of gas pressure, and means for balancing said inlet tube and valve in'their normal position under normal conditions of gas pressure.

45. An air and gas mixer comprising a mixing chamber having an air intake, a valve controlling the same, and a gas inlet tube operably connected with said valve, said gas inlet tube being sensitive to variations of gas pressure, whereby it positions said valve with respect to the air intake to maintain the same'proportions ofgas and air in the mixing chamber under varying conditions of gas pressure. r j 5. An air and gas mixer comprising a mixing chamber having an air intake, an adjustable valve controlling the air intake, a movable gas inlet tube operably connected with said valve and sensitive to variations of gas pressure whereby it adjusts said valve relatively to the air intake, and means'for balancing said inlet tube and valve to maintain them in a normal fixed position under normal conditions of gas pressure.

- 6. An air and gas mixer comprising a mixing chamber having an air intake, an adjustable valve controlling the air intake,

' a movable gas inlet tube operably connected with said valve and sensitive to variations of gas pressure whereby it ad ust-s said valve relatively to the-air intake, means for balancing said inlet tube and valve to maintain them in a normal fixed position under normal conditions of' gas pressure, an adjustable shutter for determining the area of the air intake, and means for adjusting the shutter thereto. 7 An air and gas mixer comprising a mixing-chamber having an air intake, an adjustable valve controlling the air intake, a movable gas inlet tube operably connected with said valve and sensitive to variations of gas pressure whereby it adjusts said valve relatively to the air intake, means for balancing said inlet tube and valve to maintain them in anormal fixedposition under normal conditions of gas pressure, and a needle valve opposed to the inlet end of said gas inlet tube.

' 8. An air and gas mixer comprising a mixing chamber having an air intake, an adjustable valve controlling the air intake, a movable gas inlet tube operably connect-ed with said valve and sensitive to variations of gas pressure whereby it adjusts said valve relatively to the air intake, means for balancing said inlet tube and valve to maintain them in a normal fixed position under normal conditions of gas pressure, and means for adjusting said balancing means to the normal gas pressure.

9. An' air and gas mixer comprising a mixing chamber having an air intake, an adjustable valve controlling the air intake, a movable gas inlet tube operably connected With said valve and sensitive to variations of gas pressure whereby it adjusts said valve relatively to the air intake, means for balancing said inlet tube and valve to maintain them in a normal fixed position'under normal conditions of gas pressure, a needle valve opposedto the inlet end of said gas inlet tube, meansfor adjusting said balancing means to the normal gas pressure and means for adjusting the needle valve relatively to the gas inlet tube. I Toronto, February 21st, 1913. V

EDl/VIN CHARLES JONES. Signed in the presence of- EDWARD BERNSTEIN, CHAS. H. RIoHEs.

Copies of this patent may be obtained for five cents each/by addressing the "Commissioner of Patents.

Washington, D. G. I 

